raw image	equalized image
computed depth	TCC of "normalized" spectral bottom reflectance

Bottom typing at Mahone Bay,
as of 04 septembre 2005

Image balancing has been slightly improved (still not satisfactory though) it is presented as a true color composite of deglinted image, histeq enhancement	Spectral Water-Column-Corrected Shallow Bottom Reflectance it is presented as a true color composite, histeq enhancement
Spectral Shallow Bottom Reflectance it is composited into a 3 bands BGR true color composite through a process that optimizes the visual aspect	Shallow bottoms are classified by 4SM into 7 bottom types and less than 1% unclassified
image_Z250	image_B

Optical Calibration Diagrams : 
a humbling experience for a hardy practitioner

One of the things I have learned lately: the BPL must be made 
to be parallel to the observed BPL pixels, rather than to match it closely: 
this is because the shallow bottom at BPL pixels is actually far from being spectrally neutral,
as it is now well known that "supposedly clean sands" actually harbour a host of "cyanobacterial biofilm" material
which is quite alive and active (this particularly applies to Tracady Bay dataset, as I recall).

This results is the Optical Water Type OIII+0.2 here,
which really belongs toJerlov's familly of curves of attenuation coefficients at all visible wavelengths,
as demonstrated in the calibration diagrams below.

It is quite clear that an orderly set of operational K values has been established,
although some further and minor refinements are still in order.

mb4_11_4_3_1

Calibration of bands_16_14_10_3

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